A 0.60 kg ball is rolling in a straight line on a frictionless table. The graph below shows the velocity vs time for the ball during a 25 s time interval.

1. Describe the motion of the ball, in words, during each of the time intervals shown in the graph.
2. On the axes below, sketch a graph of the acceleration as a function of time for the object. Label the scale for the acceleration.

3. Calculate the displacement of the object over the first 15 s.